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Sally, a female orangutan who previously lived in the Socialization Complex at the BOSF Samboja Lestari Orangutan Rehabilitation Centre alongside Anggoro, has now taken an important step forward in her rehabilitation journey. She has been relocated to the Juq Kehje Swen Pre-Release Island, located in Muara Wahau District, East Kalimantan. This move marks a crucial phase in preparing Sally for an independent life in the wild.

Life on a Juq Kehje Swen Pre-Release Island

Currently, Sally is the only rehabilitated orangutan living on this pre-release island. Under the close supervision and regular monitoring of our Juq Kehje Swen Team, she continues to adapt to her natural surroundings while practicing essential survival skills such as climbing, foraging for natural food, and building nests.

Video: A New Chapter Begins for Sally the Orangutan

Living on a pre-release island allows Sally to experience conditions that closely resemble her future habitat in the wild. With minimal human intervention, she is encouraged to rely on her instincts and natural behaviours. Day by day, Sally explores the island, learns its landscape, and becomes more confident navigating her environment. Thus an important indicator of her readiness for eventual release.

An Unexpected Friendship in the Forest

Behind the seriousness of her rehabilitation process, Sally has revealed a heartwarming and unexpected side of life on the island. During daily monitoring activities, our team observed that Sally has formed a unique bond with a small, furry companion—a caterpillar. This tiny creature is the larva of a moth from the Lepidoptera class.

Read more: Island #8 is Abuzz with Activity

Remarkably, Sally carries this caterpillar wherever she goes, whether she is walking along the forest floor or moving between trees high above the ground. On several occasions, the monitoring team found Sally happily playing with her little friend. The caterpillar is often gently placed on Sally’s face such as around her lips, cheeks, or forehead and sometimes even on her hand.

Exploration, Play, and Gentle Care

Sally appears to truly enjoy exploring the island with her tiny companion by her side. If the caterpillar accidentally falls, Sally will stop her activities to search for it before continuing her exploration. Even during mealtimes, Sally carefully places her small friend beside her while she eats, returning it to her face once she has finished.

This gentle and attentive behavior highlights Sally’s curiosity and sensitivity toward her environment, offering a rare glimpse into the emotional and cognitive complexity of orangutans.

Nature’s Harmony Across Species

Interactions like this are not entirely new in BOS Foundation’s rehabilitation sites. Similar observations have been recorded in the past, such as Koko and Winey an orangutans at the Nyaru Menteng Rehabilitation Centre who were once seen spending time and sharing food with long-tailed macaques (Macaca fascicularis) at a feeding platform.

Read also: Meet Orangutans Desi & Kimi

Sally and her tiny companion’s story reminds us that a healthy, well-protected forest provides space for extraordinary and unexpected interspecies interactions. These small but meaningful moments reflect the richness of biodiversity and the delicate balance within forest ecosystems.

Protecting Forests, Preserving Stories

As humans, capable of altering ecosystems on a global scale, we carry a responsibility to protect forests and the life within them. By safeguarding natural habitats, we ensure that unique, heartwarming stories like Sally and her little friend can continue to unfold in the wild, just as nature intends.

Date Posted: March 7, 2026
Text by: BOS Foundation Monitoring Team of Juq Kehje Swen, East Kalimantan

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